Rotating Coil

Code: 4640.60

Rotating Coil is an interesting device to study Faraday-Neumann-Lenz’s law

Generation of currents when a coil rotates in a magnetic field is a basic concept of hundreds of crucial applications in physics, engineering and everyday life (e.g. this is the principle of the dynamo).

This apparatus is comprised of a suspended coil free to rotate and magnets beneath; a crank will help to rotate the coil; two 4 mm sockets allow to measure the differential voltage generated by the coil or to mount a circuit. The Rotating Coil has a sturdy base with rubber feet and a security shield for safe usage.

Specifications
Size: 20x20x25 cm
Weight: 2.7 kg

Equipment Suggested
Voltage & Current Sensor (code 4840.16)

LAWS AND PRINCIPLES INVESTIGATED

Faraday-Neumann-Lenz’s law
Earth magnetic field

EXAMPLE OF USE: Faraday-Neumann-Lenz’s Law

Generate electric current

It is possible to generate electric currents in a circuit, without generators. Those currents are called “induced currents” and the phenomenon is called “magnetic induction”. The Faraday-Newmann Law describes this phenomenon, asserting that when a magnetic field varies in a certain point of a conductor, there an electric field is created. Lenz showed that the electromotive force generated in this way, produces a current generating a magnetic field opposite to the one which generated the current. So the Faraday-Newmann Law can be written as:

The negative sign shows that the f.e.m. oppose itself to the variations of the flux. Using the coil in vertical position and taking away the magnet, it is possible to find the North-South direction of the Earth’s magnetic field.

Rotating Coil used with RED Voltage & Current Sensor

Rotating Coil – code: 4640.60

Rotating Coil

Altay Scientific